Hydraulic Sewer Modelling

The main technical expertise within Clear lies in the production of robust, fit for purpose sewer hydraulic models. Our staff have developed a wealth of experience in sewer hydraulic modelling from the early days of WASSP through to the latest developments of InfoWorks and InfoNet. Clear’s staff posses a comprehensive understanding of the modelling process and its underlying principles that allow the company to exploit current modelling technology to the full. We are passionate about delivering the highest quality modelling product and service to the UK water industry.

Equally important, Clear understands and advises on the suitability and limitations of hydraulic models as tools for analysis and design.

Clear staff are experienced in the construction and verification of a large number of sewer models, from catchments of a few hundred people to catchments of a few hundred thousand people. Over the course of these studies, extensive experience has been developed in many hydraulic software applications including InfoWorks, HydroWorks, Mouse, StormPAC, SIMPOL, HEC-RAS and Wallrus.

Clear is experienced in the more complex aspects of hydraulic modelling, such as RTC, water quality, rainfall analysis, value engineering and options development.

We place great emphasis on model build documentation, to identify the strengths and limitations of a model, and to provide a clear audit trail throughout the whole modelling process.

Clear has been involved in the construction and use of hydraulic sewer models for a range of UK Clients, including Severn Trent Water, Anglian Water, United Utilities, Scottish Water, Thames Water, Wessex Water and East Midlands Airport.

Clear has produced a number of modelling guides and specifications on behalf of various water companies, ensuring that current best practice and innovation in followed.

Clear has extensive expertise in the following key areas of Hydraulic Modelling:

  • Model building for a range of catchment sizes with differing needs
  • Model conversion and enhancement
  • Model combination
  • Hydraulic verification against detailed flow surveys
  • Hydraulic verification against long term flow surveys
  • Model Maintenance and upgrade to reflect catchment changes
  • Water quality calibration against sample data
  • RTC, and the interaction between ancillary operation and sewer conditions
  • 2-D Overland flow modelling
  • Application of complex rainfall analysis techniques
  • Water quality and sediment modelling
  • River modelling
  • Integrated catchment modelling
  • UPM studies
  • Model audits